diff options
Diffstat (limited to 'lib/route.h')
| -rw-r--r-- | lib/route.h | 60 |
1 files changed, 53 insertions, 7 deletions
diff --git a/lib/route.h b/lib/route.h index 3ce8021d..1d8877c8 100644 --- a/lib/route.h +++ b/lib/route.h @@ -76,9 +76,17 @@ struct nexthop { /* For packing one into eattrs */ struct nexthop_adata { struct adata ad; - struct nexthop nh; + /* There is either a set of nexthops or a special destination (RTD_*) */ + union { + struct nexthop nh; + uint dest; + }; }; +#define NEXTHOP_DEST_SIZE (OFFSETOF(struct nexthop_adata, dest) + sizeof(uint) - OFFSETOF(struct adata, data)) +#define NEXTHOP_DEST_LITERAL(x) ((struct nexthop_adata) { \ + .ad.length = NEXTHOP_DEST_SIZE, .dest = (x), }) + #define RNF_ONLINK 0x1 /* Gateway is onlink regardless of IP ranges */ @@ -88,7 +96,6 @@ typedef struct rta { u32 hash_key; /* Hash over important fields */ struct ea_list *eattrs; /* Extended Attribute chain */ u16 cached:1; /* Are attributes cached? */ - u16 dest:4; /* Route destination type (RTD_...) */ } rta; #define RTS_STATIC 1 /* Normal static route */ @@ -109,7 +116,7 @@ typedef struct rta { #define RTS_MAX 16 #define RTD_NONE 0 /* Undefined next hop */ -#define RTD_UNICAST 1 /* Next hop is neighbor router */ +#define RTD_UNICAST 1 /* A standard next hop */ #define RTD_BLACKHOLE 2 /* Silently drop packets */ #define RTD_UNREACHABLE 3 /* Reject as unreachable */ #define RTD_PROHIBIT 4 /* Administratively prohibited */ @@ -120,10 +127,6 @@ extern const char * rta_dest_names[RTD_MAX]; static inline const char *rta_dest_name(uint n) { return (n < RTD_MAX) ? rta_dest_names[n] : "???"; } -/* Route has regular, reachable nexthop (i.e. not RTD_UNREACHABLE and like) */ -static inline int rte_is_reachable(rte *r) -{ return r->attrs->dest == RTD_UNICAST; } - /* * Extended Route Attributes @@ -331,9 +334,24 @@ extern struct ea_class ea_gen_source; static inline u32 rt_get_source_attr(rte *rt) { return ea_get_int(rt->attrs->eattrs, &ea_gen_source, 0); } +/* Flowspec validation result */ +#define FLOWSPEC_UNKNOWN 0 +#define FLOWSPEC_VALID 1 +#define FLOWSPEC_INVALID 2 + +extern struct ea_class ea_gen_flowspec_valid; +static inline u32 rt_get_flowspec_valid(rte *rt) +{ return ea_get_int(rt->attrs->eattrs, &ea_gen_flowspec_valid, FLOWSPEC_UNKNOWN); } + /* Next hop: For now, stored as adata */ extern struct ea_class ea_gen_nexthop; +static inline void ea_set_dest(struct ea_list **to, uint flags, uint dest) +{ + struct nexthop_adata nhad = NEXTHOP_DEST_LITERAL(dest); + ea_set_attr_data(to, &ea_gen_nexthop, flags, &nhad.ad.data, nhad.ad.length); +} + /* Next hop structures */ #define NEXTHOP_ALIGNMENT (_Alignof(struct nexthop)) @@ -359,7 +377,35 @@ struct nexthop_adata *nexthop_merge(struct nexthop_adata *x, struct nexthop_adat struct nexthop_adata *nexthop_sort(struct nexthop_adata *x, linpool *lp); int nexthop_is_sorted(struct nexthop_adata *x); +#define NEXTHOP_IS_REACHABLE(nhad) ((nhad)->ad.length > NEXTHOP_DEST_SIZE) +/* Route has regular, reachable nexthop (i.e. not RTD_UNREACHABLE and like) */ +static inline int rte_is_reachable(rte *r) +{ + eattr *nhea = ea_find(r->attrs->eattrs, &ea_gen_nexthop); + if (!nhea) + return 0; + + struct nexthop_adata *nhad = (void *) nhea->u.ptr; + return NEXTHOP_IS_REACHABLE(nhad); +} + +static inline int nhea_dest(eattr *nhea) +{ + if (!nhea) + return RTD_NONE; + + struct nexthop_adata *nhad = nhea ? (struct nexthop_adata *) nhea->u.ptr : NULL; + if (NEXTHOP_IS_REACHABLE(nhad)) + return RTD_UNICAST; + else + return nhad->dest; +} + +static inline int rte_dest(rte *r) +{ + return nhea_dest(ea_find(r->attrs->eattrs, &ea_gen_nexthop)); +} void rta_init(void); #define rta_size(...) (sizeof(rta)) |